package com.atguigu.java2;

import com.atguigu.java1.Person;
import org.junit.Test;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

public class OtherTest {

    // 获取构造器结构
    @Test
    public void test1() {
        Class clazz = Person.class;

        // 获取当前运行时类中声明为public的构造器，不包含父类构造器
        Constructor[] constructors = clazz.getConstructors();
        for(Constructor c : constructors) {
            System.out.println(c);
        }

        System.out.println();

        // 获取当前运行时类中声明的所有构造器
        Constructor[] declaredConstructors = clazz.getDeclaredConstructors();
        for(Constructor c : declaredConstructors) {
            System.out.println(c);
        }
    }

    // 获取运行时类的父类
    @Test
    public void test2() {
        Class clazz = Person.class;

        Class superClass = clazz.getSuperclass();
        System.out.println(superClass);
    }

    // 获取运行时类的带泛型的父类
    @Test
    public void test3() {
        Class clazz = Person.class;

        Type genericSuperclass = clazz.getGenericSuperclass();
        System.out.println(genericSuperclass);
    }

    // 获取运行时类的父类的泛型
    @Test
    public void test4() {
        Class clazz = Person.class;

        Type genericSuperclass = clazz.getGenericSuperclass();
        ParameterizedType paramType = (ParameterizedType) genericSuperclass;

        // 获取泛型类型
        Type[] actualTypeArguments = paramType.getActualTypeArguments();
        System.out.println(actualTypeArguments[0]);
        System.out.println(actualTypeArguments[0].getTypeName());
        System.out.println(((Class)actualTypeArguments[0]).getTypeName());
    }

    /**
     * 获取运行时类实现的接口
     */
    @Test
    public void test5() {
        Class clazz = Person.class;

        Class[] interfaces = clazz.getInterfaces();
        for (Class c:interfaces) {
            System.out.println(c);
        }

        System.out.println();

        /**
         * 获取运行时父类实现的接口
         */
        Class[] interface1 = clazz.getSuperclass().getInterfaces();
        for (Class c : interface1) {
            System.out.println(c);
        }
    }

    /**
     * 获取运行时类所在的包
     */
    @Test
    public void test6() {
        Class clazz = Person.class;
        Package pack = clazz.getPackage();
        System.out.println(pack);
    }

    /**
     * 获取运行时类声明的注解
     */
    @Test
    public void test7() {
        Class clazz = Person.class;

        Annotation[] annotations = clazz.getAnnotations();
        for (Annotation annos : annotations) {
            System.out.println(annos);
        }
    }
}
